Tonny Eyk, pseudonym of Teun Eikelboom, (The Hague, 4 July 1940)[1] is a Dutch composer, arranger, pianist, bandleader, producer, entertainer, columnist and writer.

Eyk has worked with world stars such as Dame Edna Everidge, Tommy Cooper, Toots Thielemans, Ringo Starr, The Three Degrees, Oleta Adams and Danny Kaye.

He partnered his twin sister Jeanette, with whom he since 1947 an accordion duo had, in the European 1958 act for the legendary Rock and Roll King, "Bill Haley and his Comets" (the world's first pop concert was banned in the Netherlands).

For decades the "Anthem Ceremony Protoculaire UCI" played during all cycling world championships was a composition by Tonny Eyk.

Together with his twin sister Jeanette (actually Sjaantje Eikelenboom) when aged seven years they formed an accordion duo called the Les Deux Jeateux [nl].

That year, on 12 November, they were seen for the first time on television in the NCRV program 'Blokband’ and as a result of this, they were invited to perform on the highly popular radio show of Johan Bodegraven [nl] : "Alle hens aan dek met Mastklimmen” (All hands on deck with Mast Climbing).

He did gigs in nightclubs and worked as a pianist in the orchestra of the then-popular singer Annie de Reuver [nl].

From 1963 Tonny Eyk conducted various radio ensembles including VARA Musette Orchestra and Koffiekamer Sounds (NCRV).

In the late sixties Tonny Eyk began some big foreign tours with various groups of Dutch artists (, Willy Alberti and Willeke Alberti, Johnny Jordaan, Cees de Lange, world champion magician Fred Kaps, Toby Rix with his toeteriks, singers Conny Vandenbos and Conny Vink [nl] and many others).

He gave concerts for Dutch emigrants in Australia, New Zealand, United States, Canada, Curacao, Suriname and in South Africa.

At the request of Aad Ouborg [nl] (from Princess Household Appliances), he worked with the famous Master Chef Cas Spijkers fifteen times in Hong Kong.

They travelled the world over (Curacao, Chicago, China, Japan, Malaysia) and made various television recordings including ‘The Big Buffet Show’ in Singapore.

In Shanghai Eyk in 2005 made videos for his children's hits (‘Op een onbewoond eiland’-On a desert island and Ik heb zo waanzinnig gedroomd- I had such a crazy dream’.

He is best known for the theme tune of the NOS Studio Sport program and for compositions for ‘Van Kooten en de Bie’.